!-------------------------------------------------------------LICENSE--------------------------------------------------------------!
!                                                                                                                                  !
!The MAP code is written in Fortran language for magnetohydrodynamics (MHD) calculation with the adaptive mesh refinement (AMR)    !
!and Message Passing Interface (MPI) parallelization.                                                                              !
!                                                                                                                                  !
!Copyright (C) 2012                                                                                                                !
!Ronglin Jiang                                                                                                                     !
!rljiang@ssc.net.cn                                                                                                                !
!585 Guoshoujing Road. Pudong, Shanghai, P.R.C. 201203                                                                             !
!                                                                                                                                  !
!This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License         !
!as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.             !
!                                                                                                                                  !
!This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of    !
!MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.                        !
!                                                                                                                                  !
!You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software     !
!Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.                                                   !
!                                                                                                                                  !
!-------------------------------------------------------------LICENSE--------------------------------------------------------------!

!==================================================================================================================================|
subroutine model_variables (ro, mx, my, mz, bx, by, bz, en, gx, gy, gz, po, x, y, z, nx, ny, nz)
!==================================================================================================================================|

   use parameters
   implicit none

   integer(4), intent(in) :: nx, ny, nz

   real(8), intent(in) :: x(nx), y(ny), z(nz)
   real(8), dimension(nx, ny, nz), intent(inout) :: ro, mx, my, mz, bx, by, bz, en, gx, gy, gz, po

   real(8) :: ri, pr

!----------------------------------------------------------------------------------------------------------------------------------|
!  Blast wave
!----------------------------------------------------------------------------------------------------------------------------------|
   do k = 1, nz
   do j = 1, ny
   do i = 1, nx

      ri = sqrt ((x(i) - 0.25d0) * (x(i) - 0.25d0) + (y(j) - 0.25) * (y(j) - 0.25d0) + (z(k) - 0.25d0) * (z(k) - 0.25d0))

      ro(i, j, k) = 1.0d0
      pr = 1.0d0
      mx(i, j, k) = 0.0d0 * ro(i, j, k)
      my(i, j, k) = 0.0d0 * ro(i, j, k)
      mz(i, j, k) = 0.0d0 * ro(i, j, k)
      bx(i, j, k) = 1.0d0 / sqrt (2.0d0)
      by(i, j, k) = 1.0d0 / sqrt (2.0d0)
      bz(i, j, k) = 1.0d0 / sqrt (2.0d0)
      if (ri .lt. 0.1d0) pr = 10.0d0
      en(i, j, k) = (mx(i, j, k) * mx(i, j, k) + my(i, j, k) * my(i, j, k) + mz(i, j, k) * mz(i, j, k)) / ro(i, j, k) / 2.0d0 +    &
         (bx(i, j, k) * bx(i, j, k) + by(i, j, k) * by(i, j, k) + bz(i, j, k) * bz(i, j, k)) / 2.0d0 + pr / gmm1
      gx(i, j, k) = 0.0d0
      gy(i, j, k) = 0.0d0
      gz(i, j, k) = 0.0d0
      po(i, j, k) = 0.0d0

   enddo
   enddo
   enddo

!----------------------------------------------------------------------------------------------------------------------------------|
end subroutine model_variables
